Clamp



Dec. ,12, 1939. B. A. TETzLAFF 2,183,175

CLAMP Filed Feb. 1'2, 1937 @Wham 'fam Wm/aha' Patented Dec. 12, 1939 I l I UNITED STATES. PATENT ori-ICE CLAMP Benjamin A. Tetzlal'l', Riverside, Ill..

Application February 12, 1937, Serial No. 125,423

i 2 Claims. (ci. 24-19) This invention relates to improvements in in side elevation applied to a pmr of telescopically clamps 'and has particular reference to hose or connected members such as a pipe and a hose. pipe clamps. Fig. 2 is an end elevation of the clamp.

one of the objects of the invention is to pro- 1 Fig. 3 is an enlarged vertical section taken on vide a heavy duty clamp in which, through simline 3-3` `of Fig- 1 ple manipulation of an adjusting or tightening Fig. 4 is an enlarged perspective view of the screw, substantially the entire circumference of arcuate bridge. the side wall of the clamped member s rmly Fig. 5 is a Side elevation 0f a elanlpembodying gripped and pressed to thereby secure a tight cona modification of my invention, and

nection between the clamped members, e Fig. '6 is an enlarged vertical section taken on 10 Still another object of the invention is to proline 6 5 0f Fig. 5. l vide a clamp wherein a single piece of metal band Referring 110W particularly t0 the Clamp ShOWn is formed circular-1y Vwith the ends thereof exin Figs.,.1to 4 inclusive, the clamp is illustrated as tending in overlapping position over the tightenretaining or Connecting a Pair 0f teleSCODed tubuing nut and in between and beyond the retaining 1er members: namely.' e rigid pipe I0 and a fiex- 15 arms of the bridge; the overlapping ends being ible hOSe l provided with aligned perforations through which The clamp comprises a single piece of exible .the tightening screw extends into operative conmetal band l2 having One end thereef DerfOrated neetien with the nue with a plurality of openings I3 which are adapt- A furtherobject of the invention is to so deed to be engaged by a hOOk Il formed on the sign the bridge thereof that the number of standother end 0f the band. It will be noted that the ard bridge umts for arrange of clamps of varying hook I4 is bent inwardly of the band so that diameters will be reduced te a To this when the ends are hooked together about a memend the side walls of the arcuate bridge are probel SUChTaS the hOSe the end 0f the haokA Will vided with spaced notches so that the same may be disposed between the side of the hose and the 95 be easily bent te the desired radii to aeeommo.. inner face of the perforated end of the band to date a predetermined range or series of varying thus leek the hOOk therebetween clamp diameters. Another important advantage An important part 0f a Clamp 0f this Characln such spaced notches inthe side walls of the ter iS the bridge l5 Which COmPrSeS an arcuate .s bridge is that when the end portions of such side base portion l5 and Slde WallS |7- The Side WallS 30 walls are bent downwardly toward one another ll are eaeh PrOVided With a Pair 0f V-shaped to form retaining arms for the metal band, the nolcheS I3 dividing each Side Wall into an intertendency to fracture such side walls is practically mediate Portieri' 0r Side Wall ITB and end porl overcome and such arms may be easily bent in a tions 7^ Comprising integral extension of Said i hand-operated iig, and further, this feature per base and which are adapted to be bent down- 35` mits the use of metal of comparatively greater Wardly tOWal'd One another into retaining arInS thickness for bridges forextra heavy duty clamps. fOr the band l2, as Shown in Figs. l. 2 and 3.

A vstill. further object of the invention is to AS ShOWn in Fig. 4 the end Portions "A are bevel the ends of the base of the bridge to a. min- Slightly higher than the intermediate Wall p0r- 40 imum thickness to thus not only afford the use tions I'I*3 to aord substantial surface engage- 4 of comparatively thicker metal for bridges for ment With the band l2 When Same are bent into heavy duty clamps and still maintain a substanretaining DOSitiOn aS ShOWn in Fig. 1. tially perfect circumferential contact between the The ends 5^ 0f the bridge base are tapered 01' clamp and the clamped member, but also to fabeveled as Shown in Figs- 3 and 4- cilitate the sliding of the band between the base A portion of the band I2 is bent over the top 45 and the retaining arms of the bridge' during the aniTwo opposite sides of a nut I9 which is held tightening of the clamp. in place by smallv tongue-like extensions Il.A

With the above and other objects in view, my Punehed and bent from the band l2 t0 project invention consists in the novel construction and underneath the nut I9. The opposite edges 0i' combination of the parts and members shown in' the portion 0f the band extending Over the t0n 50 preferred lembodiment in the attached drawing, of the nut IS-are notched to present downwardly described in the following specification .and pardi.. yJosed bent extensions I 2B to retain the nut I9 ticularly pointed out in the appended claims. against lateral displacement. The extensions I2A In the drawing: and I2la facilitate the retainment of the nut dur- Fig. 1- showsj. clamp embodying my invendon ing' the assembly of the band and bridge Il. 55

In the modified clamp shown in Figs. 5 and 6, the circular metal band I2 is formed with overlapping ends l2c and IED which overlapped end portions extend over the top and sides of the nut I9 and under and preferably slightly beyond the retaining bridge arms IIA, as clearly shown in Fig. 6. Over the top of the nut I9 the overlapped band portions are provided with concentric openings for the tightening member 20 which has threaded connection Within the nut I9 and the inner end of which is formed with a short extension 2IlA of decreased diameter for extension into an, opening within the outwardly pressed shouldered or upset portion I6c of the bridge base. The end of the tightening screw member 2U is headed by riveting operation as at 20B to retain the member 20 within the bridge base but to permit its free rotation within the upset portion I 6C.

From the above description and attached drawing it will be readily apparent that the novel improvements provided will not only increase the efficiency and usefulness of a clamp of this character but its novel structural features will facilitate its assembly during manufacture to thereby reduce its cost. 'I'he novel design of the bridge permits the use of metal of comparatively greater thickness for clamps requiring strength for special service and .the notches in the sides of the bridge not only overcome their tendency to fracture during the bending operation of the bandretaining arms but such notches readily permit the bending of the arcuate bridge base to accommodate it to correspondingly varying arcs of varying clamp diameters thus affording the standardization of the bridge for a standard clamp adaptable for use on hose or pipe of a varying range of diameters.

I claim:

1. In a clamp including a single band of flexible metal bent into substantially circular iorm and having a portion thereof bent over a threaded nut, a tightening screw extending through a perforation in said band into threaded engagement with said nut, and a bridge actuated by said screw to tighten said band; said bridge comprsing an arcuate base portion, a radially outwardly extending side wall formed integrally with opposite center portions .of each of the side edges of said base, opposed pairs of deformable extensions formed on the ends of said side edge portions of said base on either side of saidl Walls, said extensions of each pair being adapted to be bent towards each other over said base to lie in spaced relation to the top of said base and substantiaily' concentric therewith.

2. 'Ihe structure `of claim 1, and said extensions being longer than the height of said walls.

x BENJAMIN A. TETZLAF'F. 

